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Merge pull request #1950 from pikazlou/scala-flow-control-fix

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fix docs for Flow Control
This commit is contained in:
ven 2016-01-25 11:28:08 +01:00
commit 510f4e239e
1 changed files with 7 additions and 6 deletions
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scala.html.markdown
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@ -237,7 +237,7 @@ r foreach println
(5 to 1 by -1) foreach (println) (5 to 1 by -1) foreach (println)
// A while loops // A while loop
var i = 0 var i = 0
while (i < 10) { println("i " + i); i += 1 } while (i < 10) { println("i " + i); i += 1 }
@ -245,17 +245,18 @@ while (i < 10) { println("i " + i); i += 1 } // Yes, again. What happened? Why
i // Show the value of i. Note that while is a loop in the classical sense - i // Show the value of i. Note that while is a loop in the classical sense -
// it executes sequentially while changing the loop variable. while is very // it executes sequentially while changing the loop variable. while is very
// fast, faster that Java loops, but using the combinators and // fast, but using the combinators and comprehensions above is easier
// comprehensions above is easier to understand and parallelize // to understand and parallelize
// A do while loop // A do-while loop
i = 0 i = 0
do { do {
println("i is still less than 10") println("i is still less than 10")
i += 1 i += 1
} while (i < 10) } while (i < 10)
// Tail recursion is an idiomatic way of doing recurring things in Scala. // Recursion is the idiomatic way of repeating an action in Scala (as in most
// other functional languages).
// Recursive functions need an explicit return type, the compiler can't infer it. // Recursive functions need an explicit return type, the compiler can't infer it.
// Here it's Unit. // Here it's Unit.
def showNumbersInRange(a: Int, b: Int): Unit = { def showNumbersInRange(a: Int, b: Int): Unit = {
@ -273,7 +274,7 @@ val x = 10
if (x == 1) println("yeah") if (x == 1) println("yeah")
if (x == 10) println("yeah") if (x == 10) println("yeah")
if (x == 11) println("yeah") if (x == 11) println("yeah")
if (x == 11) println ("yeah") else println("nay") if (x == 11) println("yeah") else println("nay")
println(if (x == 10) "yeah" else "nope") println(if (x == 10) "yeah" else "nope")
val text = if (x == 10) "yeah" else "nope" val text = if (x == 10) "yeah" else "nope"